618
FNCA52 TJSJ 030730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST MON AUG 3 2026
DISCUSSION
A FIRE DANGER STATEMENT IS IN EFFECT FOR PORTIONS OF THE SOUTHERN
AND SOUTHWESTERN COASTAL PLAINS AND HILLS. A DRY AIR MASS WITH UP
TO HIGH CONCENTRATIONS OF SAHARAN DUST IS FORECAST TO PERSIST
OVER THE AREA TODAY, WHICH CAN DECREASE RH TO BELOW THRESHOLD
VALUES (40S TO LOW 50S). PROLONGED RAINFALL DEFICITS, MODERATE TO
SEVERE DROUGHT CONDITIONS, AND CRITICALLY DRY FUELS PERSIST
ACROSS SOUTHERN PUERTO RICO, WITH KEETCH- BYRAM DROUGHT INDEX
(KBDI) VALUES REMAINING WELL ABOVE THE CRITICAL THRESHOLD. EAST
TO EAST- SOUTHEAST WINDS ARE EXPECTED TO REMAIN ABOVE OR NEAR THE
THRESHOLD VALUES, SLIGHTLY WHICH COULD PROMOTE THE RAPID SPREAD
OF ANY FIRE THAT DEVELOPS. OTHER AREAS OF THE ISLANDS CONTINUE
WITH A MODERATE FIRE WEATHER RISK. RESIDENTS AND VISITORS SHOULD
AVOID OUTDOOR BURNING AND EXERCISE CAUTION WITH ACTIVITIES THAT
COULD GENERATE SPARKS OR OPEN FLAMES, ESPECIALLY ACROSS AREAS
WITH CRITICALLY DRY VEGETATION.
PRZ014-032000-
SOUTHEAST COASTAL PLAINS-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 93 (+5) 74 (-3) 92
RH % (24H TREND) 46 (-21) 93 (+1) 50
WIND 20FT/EARLY(MPH) E 16 E 13 E 14
WIND 20FT/LATE(MPH) SE 16 NE 12 E 16
MIXING HGT(FT-AGL/MSL)5070 4850
TRANSPORT WND (MPH) E 17 E 13
VENT RATE (KT-FT) 76050 53350
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-032000-
SOUTHERN HILLS-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 30
TEMP (24H TREND) 90 (+6) 70 (-4) 89
RH % (24H TREND) 56 (-17) 98 (+3) 59
WIND 20FT/EARLY(MPH) E 12 E 12 E 11
WIND 20FT/LATE(MPH) E 12 E 11 E 12
MIXING HGT(FT-AGL/MSL)5450 5650
TRANSPORT WND (MPH) E 16 E 13
VENT RATE (KT-FT) 76300 62150
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-032000-
NORTH COASTAL PLAINS-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 20
TEMP (24H TREND) 92 (+3) 73 (-4) 90
RH % (24H TREND) 58 (-11) 97 (+2) 62
WIND 20FT/EARLY(MPH) E 12 E 19 E 12
WIND 20FT/LATE(MPH) E 21 E 11 NE 14
MIXING HGT(FT-AGL/MSL)5130 4690
TRANSPORT WND (MPH) E 15 E 15
VENT RATE (KT-FT) 66690 60970
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-032000-
NORTHERN HILLS-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 30
TEMP (24H TREND) 91 (+5) 71 (-3) 90
RH % (24H TREND) 61 (-13) 100 (+1) 64
WIND 20FT/EARLY(MPH) E 11 E 17 E 11
WIND 20FT/LATE(MPH) E 18 E 8 NE 13
MIXING HGT(FT-AGL/MSL)6040 5200
TRANSPORT WND (MPH) E 13 E 12
VENT RATE (KT-FT) 66440 52000
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-032000-
WEST COAST-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 50
TEMP (24H TREND) 93 (+3) 71 (-4) 94
RH % (24H TREND) 58 (-9) 100 (+3) 58
WIND 20FT/EARLY(MPH) E 13 E 13 E 11
WIND 20FT/LATE(MPH) E 14 E 11 SE 12
MIXING HGT(FT-AGL/MSL)4910 4980
TRANSPORT WND (MPH) E 13 E 8
VENT RATE (KT-FT) 54010 34860
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-032000-
EASTERN INTERIOR-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 30
TEMP (24H TREND) 91 (+5) 72 (-4) 90
RH % (24H TREND) 56 (-14) 99 (+3) 60
WIND 20FT/EARLY(MPH) E 12 E 12 E 10
WIND 20FT/LATE(MPH) E 13 E 12 E 11
MIXING HGT(FT-AGL/MSL)5980 5840
TRANSPORT WND (MPH) E 16 E 13
VENT RATE (KT-FT) 83720 64240
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-032000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 40
TEMP (24H TREND) 86 (+5) 70 (-3) 86
RH % (24H TREND) 64 (-14) 100 (+2) 68
WIND 20FT/EARLY(MPH) E 11 E 11 E 9
WIND 20FT/LATE(MPH) E 11 E 11 E 10
MIXING HGT(FT-AGL/MSL)4620 4540
TRANSPORT WND (MPH) E 17 E 13
VENT RATE (KT-FT) 69300 49940
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-032000-
CENTRAL MOUNTAIN RANGE-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 40
TEMP (24H TREND) 88 (+7) 67 (-4) 87
RH % (24H TREND) 62 (-19) 100 (+1) 66
WIND 20FT/EARLY(MPH) E 9 E 9 E 9
WIND 20FT/LATE(MPH) E 10 E 6 E 9
MIXING HGT(FT-AGL/MSL)7240 6050
TRANSPORT WND (MPH) E 10 E 10
VENT RATE (KT-FT) 65160 54450
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-032000-
CAYEY MOUNTAIN RANGE-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 30
TEMP (24H TREND) 86 (+5) 70 (-3) 86
RH % (24H TREND) 64 (-13) 100 (+1) 66
WIND 20FT/EARLY(MPH) E 11 E 11 E 10
WIND 20FT/LATE(MPH) E 11 E 10 E 10
MIXING HGT(FT-AGL/MSL)5040 5350
TRANSPORT WND (MPH) E 17 E 14
VENT RATE (KT-FT) 75600 64200
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-032000-
VIEQUES-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 90 (+1) 79 (-1) 90
RH % (24H TREND) 55 (-6) 86 (0) 57
WIND 20FT/EARLY(MPH) E 14 E 16 E 11
WIND 20FT/LATE(MPH) E 17 E 16 E 12
MIXING HGT(FT-AGL/MSL)3640 3160
TRANSPORT WND (MPH) E 17 E 15
VENT RATE (KT-FT) 54600 41080
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-032000-
CULEBRA-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 91 (+2) 78 (-3) 91
RH % (24H TREND) 58 (-8) 88 (+2) 60
WIND 20FT/EARLY(MPH) E 14 E 17 E 11
WIND 20FT/LATE(MPH) E 16 E 16 E 12
MIXING HGT(FT-AGL/MSL)3640 2970
TRANSPORT WND (MPH) E 18 E 15
VENT RATE (KT-FT) 58240 38610
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-032000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 0 40
TEMP (24H TREND) 93 (+3) 73 (-3) 93
RH % (24H TREND) 47 (-17) 93 (+3) 48
WIND 20FT/EARLY(MPH) E 18 E 18 E 16
WIND 20FT/LATE(MPH) SE 19 E 16 SE 17
MIXING HGT(FT-AGL/MSL)4940 5410
TRANSPORT WND (MPH) E 21 E 13
VENT RATE (KT-FT) 88920 59510
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-032000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 89 (+2) 77 (-3) 89
RH % (24H TREND) 59 (-8) 90 (+4) 61
WIND 20FT/EARLY(MPH) E 16 E 16 E 11
WIND 20FT/LATE(MPH) E 14 E 14 E 11
MIXING HGT(FT-AGL/MSL)3590 2960
TRANSPORT WND (MPH) E 20 E 15
VENT RATE (KT-FT) 61030 38480
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-032000-
ST CROIX-
330 AM AST MON AUG 3 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 10
TEMP (24H TREND) 90 (+2) 78 (-2) 90
RH % (24H TREND) 61 (-7) 90 (+3) 62
WIND 20FT/EARLY(MPH) E 16 E 14 E 12
WIND 20FT/LATE(MPH) E 16 E 13 E 11
MIXING HGT(FT-AGL/MSL)5090 4460
TRANSPORT WND (MPH) E 21 E 15
VENT RATE (KT-FT) 91620 57980
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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